diff --git a/src/main/resources/changelog.txt b/src/main/resources/changelog.txt
index 5e3fe167..b0e32ae9 100644
--- a/src/main/resources/changelog.txt
+++ b/src/main/resources/changelog.txt
@@ -3,6 +3,11 @@ SPRING DATA GEMFIRE CHANGELOG
 http://www.springsource.org/spring-gemfire
 =============================
 
+Changes in version 1.9.21.RELEASE (2019-05-10)
+----------------------------------------------
+* SGF-829 - Release 1.9.21 (Ingalls SR21).
+
+
 Changes in version 2.1.7.RELEASE (2019-05-10)
 ---------------------------------------------
 * SGF-838 - Apply RegionConfigurers to Caching-defined Regions.